Path Computation Element (PCE) Protocol Extensions for Stateful PCE usage for Point-to-Multipoint Traffic Engineering Label Switched Paths
draft-ietf-pce-stateful-pce-p2mp-08

Document Type Active Internet-Draft (pce WG)
Last updated 2018-10-22
Replaces draft-palle-pce-stateful-pce-p2mp
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PCE Working Group                                               U. Palle
Internet-Draft                                                  D. Dhody
Intended status: Standards Track                     Huawei Technologies
Expires: April 25, 2019                                        Y. Tanaka
                                                      NTT Communications
                                                               V. Beeram
                                                        Juniper Networks
                                                        October 22, 2018

  Path Computation Element (PCE) Protocol Extensions for Stateful PCE
 usage for Point-to-Multipoint Traffic Engineering Label Switched Paths
                  draft-ietf-pce-stateful-pce-p2mp-08

Abstract

   The Path Computation Element (PCE) has been identified as an
   appropriate technology for the determination of the paths of point-
   to-multipoint (P2MP) TE Label Switched Paths (LSPs).  This document
   provides extensions required for Path Computation Element
   Communication Protocol (PCEP) so as to enable the usage of a stateful
   PCE capability in supporting P2MP TE LSPs.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   This Internet-Draft will expire on April 25, 2019.

Copyright Notice

   Copyright (c) 2018 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (https://trustee.ietf.org/license-info) in effect on the date of

Palle, et al.            Expires April 25, 2019                 [Page 1]
Internet-Draft                STATEFUL-P2MP                 October 2018

   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Requirements Language . . . . . . . . . . . . . . . . . .   4
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   4
   3.  Supporting P2MP TE LSP for Stateful PCE . . . . . . . . . . .   4
     3.1.  Motivation  . . . . . . . . . . . . . . . . . . . . . . .   4
     3.2.  Objectives  . . . . . . . . . . . . . . . . . . . . . . .   5
   4.  Functions to Support P2MP TE LSPs for Stateful PCEs . . . . .   5
   5.  Architectural Overview of Protocol Extensions . . . . . . . .   6
     5.1.  Extension of PCEP Messages  . . . . . . . . . . . . . . .   6
     5.2.  Capability Advertisement  . . . . . . . . . . . . . . . .   6
     5.3.  IGP Extensions for Stateful PCE P2MP Capabilities
           Advertisement . . . . . . . . . . . . . . . . . . . . . .   7
     5.4.  State Synchronization . . . . . . . . . . . . . . . . . .   8
     5.5.  LSP Delegation  . . . . . . . . . . . . . . . . . . . . .   8
     5.6.  LSP Operations  . . . . . . . . . . . . . . . . . . . . .   8
       5.6.1.  Passive Stateful PCE  . . . . . . . . . . . . . . . .   8
       5.6.2.  Active Stateful PCE . . . . . . . . . . . . . . . . .   9
       5.6.3.  PCE-Initiated LSP . . . . . . . . . . . . . . . . . .   9
         5.6.3.1.  P2MP TE LSP Instantiation . . . . . . . . . . . .   9
         5.6.3.2.  P2MP TE LSP Deletion  . . . . . . . . . . . . . .   9
         5.6.3.3.  Adding and Pruning Leaves for the P2MP TE LSP . .  10
         5.6.3.4.  P2MP TE LSP Delegation and Cleanup  . . . . . . .  10
   6.  PCEP Message Extensions . . . . . . . . . . . . . . . . . . .  10
     6.1.  The PCRpt Message . . . . . . . . . . . . . . . . . . . .  10
     6.2.  The PCUpd Message . . . . . . . . . . . . . . . . . . . .  12
     6.3.  The PCReq Message . . . . . . . . . . . . . . . . . . . .  13
     6.4.  The PCRep Message . . . . . . . . . . . . . . . . . . . .  14
     6.5.  The PCInitiate message  . . . . . . . . . . . . . . . . .  15
     6.6.  Example . . . . . . . . . . . . . . . . . . . . . . . . .  16
       6.6.1.  P2MP TE LSP Update Request  . . . . . . . . . . . . .  17
       6.6.2.  P2MP TE LSP Report  . . . . . . . . . . . . . . . . .  17
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